Removing the -T option from virtual_oss?

I was wondering about the use of the -T option in virtual_oss. For one,
what the argument -T expects, is always going to be /dev/sndstat, so I
find that to be quite redundant in the first place. Also, is there a
case where we wouldn't want the device to be registered to sndstat?

Attached is a patch based on the upstream [1]. I think it is more
sensible to register the device to sndstat unconditionally.

Only problem with this is backwards compatibility. I suppose if we want
to not break things, we could alternatively make the -T option a no-op.
What do you think?

Christos

[1] https://github.com/freebsd/virtual_oss